into the weir pool of Chertsey Weir. The manmade strictly-considered "island" the bypass channel forms is outranked in size since the 2002 completion of the Jubilee River by the example containing Dorney and Eton, Berkshire.

Flow and habitats

The flow is artificially constrained by less depth than medieval times and by numerous built-up weirs. These have the effect of tending to keep any flooding towards its upper

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